Machine



(No Model.) 5 SheetsS heet 2.

E E QUIMBY SGREW SWAGING MACHINE.

No. 403,072; Patented May 7, 1889.

N. PETERS. "vow-Lithograph. Whhlngiun, DJ.

(No Model.) 5 Shets-Sheet 3.

, E. E. QUIMBY.

SCREW SWAGING MAGHINE.

Patented May '7, 1889..

(No Model.) 5. Sheets-Sh.eet 4.

E. E. QUIMBY. SCREW SWAGING M'AGHINE.

No.403,072. I Patented MayY, 1889.,

(No Model.) I

E. E. QUIMBY; SCREW SWAGING MAGHINE.

N0. 403,072. Patented May '7, 1889.

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UNITED STATES- PATENT OFFICE.

EDWARD E. QUIMBY, OF ORANGE, NEWV JERSEY, ASSIGNOR TO HAYYVARD A.HARVEY, OF SAME PLACE.

SCREW-SWAGING MACHINE.

SPECIFICATION forming part of Letters Patent No. 403,072, dated May 7,1889.

Application filed February 6, 1889. Serial No. 298,842. (No model.)

To all whom it may concern:

Be it known that I, EDWARD E. QUIMBY, of Orange, New Jersey, haveinvented certain Improvements in Screw-S waging Machines, of which thefollowing is a specification.

This invention relatesto a scr'ew-swaging machine of the type in whichthe thread is formed by rolling the blank forward'and backward betweenthe faces of two appropriately-ribbed dies; and its leadingcharacteristic consists in the employment, in combination with asupporting-die, of a reciprocating die having a suflicient number ofendwise forward and backward movements or strokes to impress a spiralgroove of the desired depth upon the body of the blank rolled betweenthe dies, and then a stroke of longer range for effecting the dischargeof the finished screw and the feeding of a blank into the space betweenthe dies.

The invention also embraces a peculiar magn etic feeding device, meansfor gradually diminishing the space between the faces of the dies duringthe rolling operation, means for automatically varying at prescribedintervals the length of stroke of the crank which gives motion to thereciprocating die, and also certain features of organization tending tosimplify the machine as a whole.

The accompanying drawings of a screwswaging machine, as embodying theinvention, are as follows:

Figure 1 is a top view. Fig. 2 is a front elevation, partly in section.Fig. 3 is a longitudinal vertical section taken through the dotted lineto as on Fig. 1. Fig. 4. is a rear elevation, partly in section. Fig. 5is -a transverse vertical section taken through the plane indicated bythe dotted line y g on Fig. 1.

Fig. 6 is a transverse vertical section taken through the planeindicated by the dotted line 22 on Fig. 1. Figs. 7 and8are respectivelyfront and end elevations of the crank-head and crank-arm. Fig. 9 is asection of the crank-arm, taken through the plane indicated by thedotted line w w on Fig. 7. Fig. 10 is a top view of the adjustable arm Nand a portion of the pitman on, showing in section the adjustin -screw Pand a portion of the segmental gear 0.

In the machine represented in the drawings the Various moving parts aremounted upon a horizontal frame, A, supported on standards, A A A A A,adapted to be bolted to abench. The driving-pulley a is affixed to therear end of the crank-shaft a, the front end of which projects looselythrough the hollow hub B of the crank-pin cam B, seated in the journal0, and has affixed to it the crank-head D. The cam B is made to gain onecomplete revolution while the crank-shaft is making a prescribed numberof complete revolutions by the engagement of the spur-wheel E, fixed tothe crank-shaft, with the pinion E, fixed to the counter-shaft e, andthe engagement of the spur-wheel E fixed to the counter-shaft e,

with the pinion E fixed to the cam-hub B. For example, if the ratio ofthe diameter of the spur-wheel E to the pinion E is as four to three,while the spur-wheel E and the pinion E are equal in their diameters,the cam B will turn four times while the crank-shaft turns three times.It will be obvious that by appropriately changing the relative diametersof these spur-wheels and pinions the cam B may be made to rotate at anyother desired rate.

Seated in the crank-head D is the radiallysliding crank-arm cl, carryingthe crank-pin d, which is a hardened-steel pin held in place by theset-screw D. The rearwardly-proj ect- 8o ing portion of the pin d is,for convenience, made to serve as the cam-pin for engaging thecam-groove b in the face of the cam B, which controls the slidingmovement of the crankarm d, and thus governs the length of stroke of thecrank.

The pitman F, connected at one end to the crank-pin d, is at itsopposite end pivoted to the slide or die-carriage F, carrying the die G,to which is thus imparted reciprocating motion in a plane parallel withthe face of the supporting-die H. During two successive turns of thecrank the die G is alternately moved to a position in which its face isopposite the face of thedie H, and then to a position in which only asmall portion of its face is opposite that of the die I-I, so that ablank which is being operated upon will not be rolled clear of the diesat either end of the stroke; but toward the conclusion of the next turnof the crank the cam-pin d is overtaken by the eccentric portion b'pfthe cam-groove I), and the crankarm d is consequently made to slide inits bearings, carrying the crankpin (1 radially outward, so that at theend of the stroke the cam-groove and pin occupy the position in whichthey are represented in Fig. 2. There is thus produced an elongation ofthe stroke, during which the finished screw is rolled clear oif the endof the die II, and the die G is drawn back preparatory to thepresentation of another blank to be rolled between the dies.

The presentation or feeding of the blank may be effected in any of thewell-known methods, and the motion to operate the feeding devices may bederived from the die-can riage F.

The feeding mechanism shown in the drawings consists of the usualinclined parallel ways I l, terminating at their lower extremity in theshort horizontal ways, consisting of the stationary bar 1' and thevertically-11in ged bar 1', which if desired, may be made of brass orother non-magnetizable material. A spring, i tends to press the free endof the hinged bar 1" against the stationary bar 2', as shown in Fig. 1.

The blank-delh erer J is an endwise-reciprocating fiat bar, preferablyof magneticallypolarized steel, so supported upon the frame of themachine by guiding devices that its path of motion is parallel with theplane of motion of the reciprocating die.

A simple mode of constructing and guiding the deliverer is illustratedin the drawings, in which the deliverer J is represented as affixed toor formed in one piece with the angle-bar J, which is longitudinallyslotted, as shown, to admit the vertical screws j and the horizontalscrew j, which are inserted in the frame of the machine and which serveto guide the deliverer in its horizontal path of reciprocation.

In the position which it occupies preparatory to the performance of itsdelivering function the end J 2 of the slide-bar J is nearly flush withthe inner surface of the side I of the inclined ways, the slide-barhaving been drawn back to that position by the arm K, under theinfluence of the contracting spiral spring K, attached at one end to thearm K and at its opposite end to the frame of the machine.

The under edge of the slide-bar J is provided with the notch J 3 foradmitting the upper end of the arm K and the upper end of the spring Kaffixed to the arm K.

The object of the spring K is to permit a small range of additionalmovement of the arm K when the feeding mot-ion of the deliverer has beenarrested by the seizure between the dies of the blank, against which theend J 2 of the deliverer bears.

The swinging of the arm K to impart the feeding motion to the delivereris effected during the first portion of the forward long stroke of thecrank by the engagement of the spring-tooth 7c, pivoted to the side ofthe arm K with the shoulder f on the longitudinally-adjustable arm f,aflixed to the earf projecting downward from and forming a part of theslide or die-carriage F. During the latter portion of the return longstroke of the crank the tooth 7.2, after having at first been depressedby collision with the under edge of the arm f, has sprung upward intothe position and relation to the shoulder frepresented in Fig. 2.

It is intended that the feeding motion of the deliverer shall bearrested at the instant when the body of the blank which is being fedhas been carried into contact with the adjacent end of the stationarydie H and the advancing end of the die G has arrived at a point nearlyopposite the adjacent end of the die II, so that the body of the blankis seized by the two dies. To reach the desired point in proper time,the blank, having farther to travel than the advancing end of the die G,must be moved more rapidly than the die G. This is effected by suitablyproportioning the difference in radius between the end of the arm Kwhich drives the deliverer and the position upon the arm K of the toothk which is engaged by the shoulder f of the arm f. The tooth is istripped out of engagement with the shoulder fat the conclusion of thefeeding motion by the collision of its short arm with the adjustabletripper k aflixed to the frame of the machine, and the arm K, being thusreleased, is pulled back by its spring K, and pulls back the delivererto the positions in which the parts are represented in Fig. 2.

\Vhile the blank is moved forward toward the die the hinged spring-bart" of the ways yields, and after the blank has been seized by the diessprings back against the stationary bar 2', as shown in Fig. 2. Theblank is then rolled back and forth between the two dies until, duringthe concluding portion of the third return-stroke, which, as has beenexplained, is the long stroke, it is rolled clear oif the end of thestationary die II, and drops through a suitable opening in the bed Aupon which the die-carriage F slides. In being discharged the finishedscrew is prevented from being caught in the ways by its collision withthe outer side of the hinged bar 1'.

By making the deliverer of hardened steel and magnetizing it the body ofthe blank will adhere to the end J of the deliverer with sufficientenergy to maintain the blank in a perpendicular position during thefeeding operation, notwithstanding the friction of the hinged bar t"upon the portion of the body of the blank adjoining the head.

The employment of the magnetic deliverer permits of a very rapid feedmotion being used, because the attractive force of the magnet overcomesthe momentum which the blank acquires, and insures the stopping of theblank concurrently with the stoppage of the deliverer at the end of thefeeding-stroke.

It will be seen that by disengaging the gearing by which motion istransmitted from the crank-shaft to the crank-pin cam the timing of thecam relatively to the crank-arm can be changed, so that the eccentricpart b of the cam-groove will overtake the cam-pin at the end of everythird forward stroke instead of at the end of every third return-stroke,as represented in the drawings. I By this change and the appropriatereversal in posit-ion of the ways, the deliverer, and its actuatingmechanism the finished screw may be discharged from the dies during theelongated concluding portion of the forward stroke and the-next blankfed to the dies during the first portion of the elongated return-stroke.

If it be desired to discharge the finished scre-wfrom one end of the dieH, and to feed the next blank tothe other end of the die H,

as has heretofore been practiced, it will only be necessary to prolongthe radially-extended portion of the cam-groove b, as indicated by thedotted line in Fig. 2, in which case the die G will be moved asufficient distance beyond the die H to discharge 'the finished screw atone end, and will continue its-motion in the opposite direction asufficient distance to permit the next blank to be fed at the oppositeend of the die G.

By appropriately changing the gearing the crank-pin cam may be made togain, for example, one t-urn while the crankshaft is making two turns,in which case the elongated stroke will occur at every alternaterevolution of the crank. Two turns of the crank will suffice to effectthe rolling of a thread upon a blank of small diameter. In the case ofblanks of larger diameter, requiring a larger number of turns to effectthe rolling a thread of proper depth, the crank-controlling cam B may beso geared to the crank-shaft as to gain, for example, one turn while thecrankshaft is making four turns, so that every fourth turn will producethe long stroke and the blank will be rolled back and forth between thedies four times before being discharged. During the operation of rollingthe thread upon the blank the dieH is gradually fed toward the plane ofmotion of the die G. To this end the die H is mounted upon thelaterally-sliding carriage H, the position of which is controlled by thefeed-screw h.

The motion for rotating the feed-screw is derived from the scroll-cam L,affixed to the counter-shaft L, which is made'to rotate once while thecrank-shaft is rotating three times by the engagement of the pinion Z,affixed to the crank -shaft with the gear-wheel Z, of three times itsdiameter, affixed to the counter-shaft L. The scroll-cam imparts motionin one direction to the horizontal slide-bar M, which is longitudinallyslotted to receive its guide-screws M r M, which are inserted in theframe of the machine. The pitman m pivoted at one end to the slide-barM, is pivoted at its opposite end to a radially-adjusta ble crank-pin,N, mounted upon the adjustable arm N, which is connected by means of thepivot N to the segmental gear 0, the

teeth of which mesh with the pinion h, af-

of the segmental gear 0.

Two nuts or collars, p p, are pinned to the shank of the adjusting-screw P, one immediately above and the other immediately beneaththe slotted portion of the arm N.

By appropriately turning the adjustable screw P the crank-pin N is movednearer to or farther from the axis of the'segmental gear 0, as may bedesired. The adjusting-screw P is supplied with a jam-nut, P, for thepurpose of securing it in the position to which it may be adjusted. Theradius of the segmental gear 0 is considerably greater than the radiusof the pinion h. By varying the position of the crank-pin N relativelyto the axis of the segment 0 the motion derived from the scroll-cam Lmaybe made to impart a greater or less extent of rotation to the pinionh, and hence the extent to which the die H is fed toward the plane ofmotion of the die G may be accurately regulated with reference toeffecting the formation upon the blank of a groove of the desired depth.Concurrently with the discharge of the finished screw the outer end, Lof the vertical scroll surface of the cam L clears the adjacent end ofthe slide-bar M. The retracting-spring Q, at one end connected to theframeof the machine and at the other end connected to the segment 0,then pulls the segment back into the position into which it has beenswung by the action of the scroll-cam, and hence moves the pitman andthe slide-barM back into the positions in which they are represented inFig. 1, and thereby withdraws the die H preparatory to a repetition ofthe die-feeding operation, while the next blank is beingrolled betweenthe dies.

IIO

In the organization illustrated in the drawings the crank-pin cam B ismade to rotate faster than the crank-shaft, so that it gains one turnwhile the crank-shaft is making three turns, and is thereby made toelongate the third stroke of the crank, as has been described. changingthe gearing which rotates the cam B as to make the cam B lose onerevolution while the crank-shaft is making three revolutions, in whichcase the crank-pin d will overtake and be thrown radially outward by theeccentric portion 6 of the cam-groove b at the same stage of every thirdrevolution.

It will therefore be perceived that whatever maybe the number of strokesrequired to impress upon the blank a groove of the die sired depth itwill only be necessary to so time the movements of the cam B as to haveThe same result is attainable by so it either gain or lose one completerevolution while the crank-shaft is making any prescribed number ofcomplete revolutions.

\Vhat is claimed as the invention is- 1. In a screw-swaging machine ofthe type in which the thread upon the shank of the blank is formed bythe rolling of the blank to and fro between the suitably-ribbed opposingfaces of two dies, the combination, as herein set forth, of asupporting-die and an endwise-reciprocating die, and means for impartingto the reciprocating die a prescribed number of relatively short strokesfor rolling the blank forward and backward along the face of thesupporting-die, and then a longer stroke for efiecting the discharge ofthe finished screw preparatory to the delivery of another blank to theoperation of the dies.

2. The combination, as herein set forth, of a supporting die, an endwise1noving die mounted upon a reciprocating carrier, a m ovable crank-arm,a pitman connecting said carrier with a crank-pin inserted in saidmovable crank-arm, and a cam for varying at prescribed intervals thedistance of said crankpin from the axis of the crank-shaft andcorrespondingly varying the movement of said reciprocating carrier.

3. The combination, as herein set forth, of the supporting-die H, theendwise-moving die G, the reciprocating-die carriage F, the pitman F,the radially-movable crank-pin (Z, the crank-pin cam B, loosely mountedupon the crank-shaft a, and suitable gearing for rotating said cam at aspeed varyingin prescribed degree from the speed of rotation of saidcrank-shaft.

at. The combination, as herein set forth, of a supporting-die, anendwise -reciprocating die, means for producing an elongated stroke ofsaid reciprocating die at prescribed intervals and thereby dischargingthe finished screw, and a deliverer for delivering a blank to the diesduring the first portion of the next following return-stroke of saidreciprocating die, whereby the blank is fed to the same end of thesupporting-die as thatfrom which the finished screw was discharged.

5. The combination, as herein set forth, of the slide-bar or delivererJ, with the shouldered arm f, connected to the reciprocatingdie carriageF, the pivoted arm K, the springtooth 70, mounted upon the arm K, thetripper 70 and the spring'K, for the purpose of eifecting the operationof the deliverer by motion derived from the die-carriage F.

6. The combination, as herein set forth, of the dies G and H, the wayscomposed of the stationary bar 7: and the hinged bar i, the deliverer J,and means, substantially as described, for imparting prescribed endwisemovements to the die G and to the deliverer J, respectively.

7. The combination, as herein set forth, of a reciprocating die and asupporting-die, and appropriately arranged Ways for guiding blankssuspended in said ways, with a magnetic deliverer for delivering blankssuccessively from said ways to said dies.

8. The combination, as herein set forth, of: the laterally-slidingdie-carriage H, the feedscrew h, the pinion h, the segmental gear 0, theradially-adjustable crank-pin N, the pitman on, and slide-bar M, withthe cam L and retracting-spring Q.

ED? E. QUI'MB'Y.

\Vitnesses:

D. W. GARDNER, A. M. J ONES.

